Alert archive / South Dakota / Flash Flood Warnings in 2021
Flash Flood Warning 2, NWS Aberdeen, SD
NWS Aberdeen, SD issued this flash flood warning at Jun 8, 2021, 6:44 PM MDT for Corson County, Dewey County, South Dakota. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 8, 2021, 6:44 PM MDT (00:44 UTC)
- Expired
- Jun 8, 2021, 9:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Corson County, SD, Dewey County, SD
The radar
The Bismarck radar (KBIS), 156 km from the middle of the area, began a volume at 00:44 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 8, 8:28 PM MDT | FLASH FLOOD | 4 N Firesteel, SD | WATER RUNNING OVER COUNTY ROAD 4 MILES NORTH OF FIRESTEEL. STOCK DAMS OVERTOPPED WITH WATER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.7 hours before the alert went out and 158 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 113 J/kg
- Mixed-layer CIN
- -181 J/kg
- Mixed-layer LCL
- 2317 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
080
WGUS53 KABR 090044
FFWABR
SDC031-041-090345-
/O.NEW.KABR.FF.W.0002.210609T0044Z-210609T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Aberdeen SD
744 PM CDT Tue Jun 8 2021
The National Weather Service in Aberdeen has issued a
* Flash Flood Warning for...
South Central Corson County in north central South Dakota...
Northwestern Dewey County in north central South Dakota...
* Until 945 PM MDT.
* At 644 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 5 inches of rain has
fallen. The expected rainfall rate is 0.5 to 1 inch in 1 hour.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Firesteel, southern Standing Rock Nation and northern Cheyenne
River Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4554 10166 4557 10122 4537 10123 4542 10147
4544 10147 4547 10147 4547 10149 4547 10150
4547 10165 4547 10166 4547 10169 4547 10171
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR
$$
ParkinThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 6:17 PM MDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 43 min |
| Jun 8, 6:22 PM MDT | Flash Flood Warning | ABR | Corson | 3 hr |
| Jun 8, 6:44 PM MDT | Special Weather Statement | ABR | Corson | 31 min |
| Jun 8, 7:02 PM MDT | Special Weather Statement | ABR | Corson | 28 min |
| Jun 8, 7:11 PM MDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 49 min |
| Jun 8, 7:21 PM MDT | Tornado Warning | ABR | Corson, Dewey | 24 min |
| Jun 8, 7:25 PM MDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 50 min |
| Jun 8, 7:44 PM MDT | Tornado Warning | ABR | Corson | 16 min |
| Jun 8, 8:11 PM MDT | Special Weather Statement | ABR | Corson | 34 min |
| Jun 8, 8:28 PM MDT | Severe Thunderstorm Warning | ABR | Dewey | 47 min |
| Jun 8, 9:12 PM MDT | Severe Thunderstorm Warning | ABR | Dewey | 36 min |
| Jun 8, 9:33 PM MDT | Flash Flood Warning | ABR | Corson, Dewey | 8 hr |
| Jun 8, 10:54 PM MDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 66 min |
| Jun 8, 11:58 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Jones, Stanley | 37 min |
| Jun 9, 12:03 AM MDT | Special Weather Statement | ABR | Corson, Dewey | 57 min |
| Jun 9, 12:40 AM MDT | Special Weather Statement | ABR | Jones, Stanley | 65 min |
Nearby
Flash Flood Warnings in South Dakota, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.